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The XF200A ultrasonic wind sensor is a measuring instrument that uses the time difference of ultrasonic propagation in the air to measure wind speed and direction. Extensive urban environment monitoring, wind power generation, weather monitoring, tunnels and tunnels, marine ships, aviation airports and other fields.
link:http://www.compactweathersensor.com
XF200A Outdoor No Maintenance Alloy Ultrasonic 2-in-1 Wind Speed Sensor And Wind Direction Sensor